function modaldemo() {
    layer.open({
        type: 1,
        title:"编辑备注",
        skin:"radius1",
        area: ['550', '400px'], //宽高
        content: '<textarea type="text" placeholder="请输入备注说明（客户可见）"style="width:450px;height:190px; resize: none;margin:40px;margin-top:30px;margin-bottom:0;"></textarea>',
        btn:['确认','取消'],
    });
}